Cannot add line item, sandbox,,Cannot create item in sandbox, therefor I cannot create sandbox store
Hello, I have tried to create items in two ways, one was using AddItem API from the TradingApi section and every time I get the error displayed on the image attached below. It is not descriptive so I don't know why I can't create it. The other way was using you sandbox form for adding line item (template), but whenever I want to upload a product image, I get an error and I only get the spinner spinning, the image cannot be uploaded, but since it is a required field, I cannot create line item. I would need help quickly if anyone from the support team is available. Thank you!